From the optics Apple typically TOP. The technique works great right and left click go wonderfully, the scroll ball also does his duty. The side buttons are unfortunately super hard to use can push yourself very hard and are attached unfavorable. What I look at is the one big mistake that keys can not really prove free recite the Scroll Ball for example. as back button the side buttons as close etc. But luckily there are alternative software like Steer Mouse so you can see the buttons show as you like but is chargeable. Otherwise a super mouse.
